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From Ancient Greek ἐρυθρός (eruthrós, “red”) + -ine, equivalent to erythro- + -s- + -ine.
Etymology from Wiktionary, CC BY-SA 4.0.
erythrosine
Today it means: tetraiodo-fluorescein, a cherry-pink fluorone used as a food colouring, in printing inks, and as a biological stain, a dental plaque disclosing agent and a radiopaque medium. Full definition →